ReadOnlyException(java.lang.String text)
Constructs a new read-only exception with the given text.

ReadOnlyException(java.lang.String text,
java.lang.Throwable cause)
Constructs a new read-only exception when the portlet needs to do
the following:
throw an exception
include a message about the "root cause" that interfered
with its normal operation
include a description message

ReadOnlyException(java.lang.Throwable cause)
Constructs a new read-only exception when the portlet needs to throw an
exception.